Thanks guys, yes I have heard of Kamanthu and having gathered the informations here I believe Nepal should be it. Planning to go there someday. Oh they have summer? I thought it was winter and cold thoughout due to its high plain. If I can visit Lhasa that will be great too, I want to see what was inside there and make you feel so on top of the world.:p
Put your budget in US Dollars, Go during winter. Expect lots of black outs. Expect lots of hustling. No such thing as meter cab. Do all your hotel booking via Agoda.com. Brush and wash your mouth with Mineral water. Eat only at restaurant. And smoke lots of Hashish (Don't pay more then 1000 or 1500 rupee for a Tola of Hash* 10 gram) Peace and Enjoy your trip.
P.s ..Etc for an entire day of Sight seeing, just hail a cab and neg. with them.
Bring touch light.
Get your snacks/water from the Air-con supermarket in thamel chowk
Main Tourist spot in Kathmandu is Thamel(Book your hotel in or close to this area)
Have breakfast or high tea at this german bakery called Pumpernickle.
Thamel Chowk is the main area to have lunch, dinner, breakfast and shopping.
Will be very hard to exchange Nepali rupee in Singapore(You will maybe get to change about 30 or 40 Sing dollars at Mustafa)*Change all your Singapore dollars into USD before going there.\
Visa is needed, Get it done in Singapore.(24 Hours)
Start looking out of the window 40mins prior to landing as you will get to catch the top of Mount Everest.